US4815130A - Stream cipher system with feedback - Google Patents
Stream cipher system with feedback Download PDFInfo
- Publication number
- US4815130A US4815130A US07/097,307 US9730787A US4815130A US 4815130 A US4815130 A US 4815130A US 9730787 A US9730787 A US 9730787A US 4815130 A US4815130 A US 4815130A
- Authority
- US
- United States
- Prior art keywords
- shift register
- message
- bit
- output
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/12—Details relating to cryptographic hardware or logic circuitry
- H04L2209/125—Parallelization or pipelining, e.g. for accelerating processing of cryptographic operations
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Storage Device Security (AREA)
Abstract
Description
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/097,307 US4815130A (en) | 1986-10-03 | 1987-09-14 | Stream cipher system with feedback |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US91457286A | 1986-10-03 | 1986-10-03 | |
US07/097,307 US4815130A (en) | 1986-10-03 | 1987-09-14 | Stream cipher system with feedback |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US91457286A Continuation | 1986-10-03 | 1986-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4815130A true US4815130A (en) | 1989-03-21 |
Family
ID=26793099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/097,307 Expired - Lifetime US4815130A (en) | 1986-10-03 | 1987-09-14 | Stream cipher system with feedback |
Country Status (1)
Country | Link |
---|---|
US (1) | US4815130A (en) |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4876718A (en) * | 1987-03-12 | 1989-10-24 | Zenith Electronics Corporation | Secure data packet transmission system and method |
US5014313A (en) * | 1989-07-07 | 1991-05-07 | Motorola, Inc. | Text modifier |
US5086468A (en) * | 1989-07-07 | 1992-02-04 | Motorola, Inc. | Text modifier |
US5159634A (en) * | 1991-09-13 | 1992-10-27 | At&T Bell Laboratories | Cryptosystem for cellular telephony |
US5195136A (en) * | 1991-09-30 | 1993-03-16 | Motorola, Inc. | Method and apparatus for data encryption or decryption |
US5231667A (en) * | 1990-12-10 | 1993-07-27 | Sony Corporation | Scrambling/descrambling circuit |
US5323463A (en) * | 1991-12-13 | 1994-06-21 | 3Com Corporation | Method and apparatus for controlling the spectral content of a data stream |
EP0666663A1 (en) * | 1994-02-04 | 1995-08-09 | Koninklijke KPN N.V. | Cryptographic device |
US5444781A (en) * | 1993-08-23 | 1995-08-22 | Apple Computer Inc. | Method and apparatus for decryption using cache storage |
US5809147A (en) * | 1994-03-18 | 1998-09-15 | Koninklijke Ptt Nederland | Device for cryptographically processing data packets and method of generating cryptographic processing data |
US5859912A (en) * | 1996-03-22 | 1999-01-12 | General Electric Company | Digital information privacy system |
US5978481A (en) * | 1994-08-16 | 1999-11-02 | Intel Corporation | Modem compatible method and apparatus for encrypting data that is transparent to software applications |
US6122379A (en) * | 1996-05-30 | 2000-09-19 | Deloitte & Touche Inc. | Method and apparatus for performing simultaneous data compression and encryption |
US6215876B1 (en) | 1997-12-31 | 2001-04-10 | Transcrypt International, Inc. | Apparatus for and method of detecting initialization vector errors and maintaining cryptographic synchronization without substantial increase in overhead |
US6249582B1 (en) | 1997-12-31 | 2001-06-19 | Transcrypt International, Inc. | Apparatus for and method of overhead reduction in a block cipher |
US6360320B2 (en) * | 1997-04-23 | 2002-03-19 | Sony Corporation | Information processing apparatus, information processing method, information processing system and recording medium using an apparatus id and provided license key for authentication of each information to be processed |
US6393125B1 (en) * | 1997-07-11 | 2002-05-21 | Zarlink Semiconductor Inc. | Initializer for a confusion data generator |
US6460137B1 (en) * | 1995-06-02 | 2002-10-01 | Fujitsu Limited | Encryption processing system |
US6731754B1 (en) | 1996-06-21 | 2004-05-04 | Netcomsec Co., Ltd. | Apparatus and method for maintaining and transmitting secret contents of a signal |
US20050053240A1 (en) * | 2003-09-09 | 2005-03-10 | Peter Lablans | Ternary and higher multi-value digital scramblers/descramblers |
US6891952B1 (en) * | 1998-12-07 | 2005-05-10 | International Business Machines Corporation | Dynamic key generation and confidential synchronization of encryption components |
US20050184888A1 (en) * | 2004-02-25 | 2005-08-25 | Peter Lablans | Generation and detection of non-binary digital sequences |
US20050185796A1 (en) * | 2004-02-25 | 2005-08-25 | Peter Lablans | Ternary and multi-value digital signal scramblers, descramblers and sequence generators |
US20050194993A1 (en) * | 2004-02-25 | 2005-09-08 | Peter Lablans | Single and composite binary and multi-valued logic functions from gates and inverters |
US20060021003A1 (en) * | 2004-06-23 | 2006-01-26 | Janus Software, Inc | Biometric authentication system |
US20060031278A1 (en) * | 2004-08-07 | 2006-02-09 | Peter Lablans | Multi-value digital calculating circuits, including multipliers |
US20060227967A1 (en) * | 2005-04-11 | 2006-10-12 | Tomoki Nishikawa | Data processing system and method |
US7190787B1 (en) * | 1999-11-30 | 2007-03-13 | Intel Corporation | Stream cipher having a combiner function with storage based shuffle unit |
US20070110229A1 (en) * | 2004-02-25 | 2007-05-17 | Ternarylogic, Llc | Ternary and Multi-Value Digital Signal Scramblers, Descramblers and Sequence of Generators |
US20090128190A1 (en) * | 2004-02-25 | 2009-05-21 | Peter Lablans | Implementing Logic Functions with Non-Magnitude Based Physical Phenomena |
US7548092B2 (en) | 2004-02-25 | 2009-06-16 | Ternarylogic Llc | Implementing logic functions with non-magnitude based physical phenomena |
US20100164548A1 (en) * | 2004-09-08 | 2010-07-01 | Ternarylogic Llc | Implementing Logic Functions With Non-Magnitude Based Physical Phenomena |
WO2011001030A1 (en) * | 2009-06-29 | 2011-01-06 | Envault Corporation Oy | Method and arrangement for protecting file-based information |
US20110064214A1 (en) * | 2003-09-09 | 2011-03-17 | Ternarylogic Llc | Methods and Apparatus in Alternate Finite Field Based Coders and Decoders |
US8374289B2 (en) | 2004-02-25 | 2013-02-12 | Ternarylogic Llc | Generation and detection of non-binary digital sequences |
US8577026B2 (en) | 2010-12-29 | 2013-11-05 | Ternarylogic Llc | Methods and apparatus in alternate finite field based coders and decoders |
US8861725B2 (en) | 2012-07-10 | 2014-10-14 | Infineon Technologies Ag | Random bit stream generator with enhanced backward secrecy |
US8879733B2 (en) | 2012-07-10 | 2014-11-04 | Infineon Technologies Ag | Random bit stream generator with guaranteed minimum period |
US9009496B2 (en) | 2008-09-22 | 2015-04-14 | Envault Corporation Oy | Method and apparatus for implementing secure and selectively deniable file storage |
US10263968B1 (en) * | 2015-07-24 | 2019-04-16 | Hologic Inc. | Security measure for exchanging keys over networks |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3071649A (en) * | 1946-06-19 | 1963-01-01 | Bell Telephone Labor Inc | Cipher system for pulse code modulation communication system |
US3654604A (en) * | 1970-01-05 | 1972-04-04 | Constellation Science And Tech | Secure communications control system |
US3688193A (en) * | 1969-08-13 | 1972-08-29 | Motorola Inc | Signal coding and decoding system |
US3925612A (en) * | 1963-01-30 | 1975-12-09 | Patelhold Patentverwertung | Digital scrambling apparatus for use in pulsed signal transmission |
US4152545A (en) * | 1965-04-05 | 1979-05-01 | Martin Marietta Corporation | Pulse position modulation secret communication system |
US4157454A (en) * | 1976-12-22 | 1979-06-05 | International Business Machines Corporation | Method and system for machine enciphering and deciphering |
US4255811A (en) * | 1975-03-25 | 1981-03-10 | International Business Machines Corporation | Key controlled block cipher cryptographic system |
US4304962A (en) * | 1965-08-25 | 1981-12-08 | Bell Telephone Laboratories, Incorporated | Data scrambler |
US4316055A (en) * | 1976-12-30 | 1982-02-16 | International Business Machines Corporation | Stream/block cipher crytographic system |
US4434322A (en) * | 1965-08-19 | 1984-02-28 | Racal Data Communications Inc. | Coded data transmission system |
US4447672A (en) * | 1980-10-06 | 1984-05-08 | Nippon Electric Co., Ltd. | Device for encrypting each input data bit by at least one keying bit decided by a code pattern and a bit pattern of a predetermined number of preceding encrypted bits |
US4663500A (en) * | 1982-02-22 | 1987-05-05 | Nec Corporation | Cryptographic system |
-
1987
- 1987-09-14 US US07/097,307 patent/US4815130A/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3071649A (en) * | 1946-06-19 | 1963-01-01 | Bell Telephone Labor Inc | Cipher system for pulse code modulation communication system |
US3925612A (en) * | 1963-01-30 | 1975-12-09 | Patelhold Patentverwertung | Digital scrambling apparatus for use in pulsed signal transmission |
US4152545A (en) * | 1965-04-05 | 1979-05-01 | Martin Marietta Corporation | Pulse position modulation secret communication system |
US4434322A (en) * | 1965-08-19 | 1984-02-28 | Racal Data Communications Inc. | Coded data transmission system |
US4304962A (en) * | 1965-08-25 | 1981-12-08 | Bell Telephone Laboratories, Incorporated | Data scrambler |
US3688193A (en) * | 1969-08-13 | 1972-08-29 | Motorola Inc | Signal coding and decoding system |
US3654604A (en) * | 1970-01-05 | 1972-04-04 | Constellation Science And Tech | Secure communications control system |
US4255811A (en) * | 1975-03-25 | 1981-03-10 | International Business Machines Corporation | Key controlled block cipher cryptographic system |
US4157454A (en) * | 1976-12-22 | 1979-06-05 | International Business Machines Corporation | Method and system for machine enciphering and deciphering |
US4316055A (en) * | 1976-12-30 | 1982-02-16 | International Business Machines Corporation | Stream/block cipher crytographic system |
US4447672A (en) * | 1980-10-06 | 1984-05-08 | Nippon Electric Co., Ltd. | Device for encrypting each input data bit by at least one keying bit decided by a code pattern and a bit pattern of a predetermined number of preceding encrypted bits |
US4663500A (en) * | 1982-02-22 | 1987-05-05 | Nec Corporation | Cryptographic system |
Cited By (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4876718A (en) * | 1987-03-12 | 1989-10-24 | Zenith Electronics Corporation | Secure data packet transmission system and method |
US5014313A (en) * | 1989-07-07 | 1991-05-07 | Motorola, Inc. | Text modifier |
US5086468A (en) * | 1989-07-07 | 1992-02-04 | Motorola, Inc. | Text modifier |
US5231667A (en) * | 1990-12-10 | 1993-07-27 | Sony Corporation | Scrambling/descrambling circuit |
US5159634A (en) * | 1991-09-13 | 1992-10-27 | At&T Bell Laboratories | Cryptosystem for cellular telephony |
US5195136A (en) * | 1991-09-30 | 1993-03-16 | Motorola, Inc. | Method and apparatus for data encryption or decryption |
US5323463A (en) * | 1991-12-13 | 1994-06-21 | 3Com Corporation | Method and apparatus for controlling the spectral content of a data stream |
US5444781A (en) * | 1993-08-23 | 1995-08-22 | Apple Computer Inc. | Method and apparatus for decryption using cache storage |
NL9400176A (en) * | 1994-02-04 | 1995-09-01 | Nederland Ptt | Cryptographic device. |
EP0666663A1 (en) * | 1994-02-04 | 1995-08-09 | Koninklijke KPN N.V. | Cryptographic device |
US5809147A (en) * | 1994-03-18 | 1998-09-15 | Koninklijke Ptt Nederland | Device for cryptographically processing data packets and method of generating cryptographic processing data |
US5978481A (en) * | 1994-08-16 | 1999-11-02 | Intel Corporation | Modem compatible method and apparatus for encrypting data that is transparent to software applications |
US6460137B1 (en) * | 1995-06-02 | 2002-10-01 | Fujitsu Limited | Encryption processing system |
US5859912A (en) * | 1996-03-22 | 1999-01-12 | General Electric Company | Digital information privacy system |
US6122379A (en) * | 1996-05-30 | 2000-09-19 | Deloitte & Touche Inc. | Method and apparatus for performing simultaneous data compression and encryption |
US6731754B1 (en) | 1996-06-21 | 2004-05-04 | Netcomsec Co., Ltd. | Apparatus and method for maintaining and transmitting secret contents of a signal |
US6360320B2 (en) * | 1997-04-23 | 2002-03-19 | Sony Corporation | Information processing apparatus, information processing method, information processing system and recording medium using an apparatus id and provided license key for authentication of each information to be processed |
US6393125B1 (en) * | 1997-07-11 | 2002-05-21 | Zarlink Semiconductor Inc. | Initializer for a confusion data generator |
US6404888B1 (en) | 1997-07-11 | 2002-06-11 | Zarlink Semiconductor Inc. | Confusion data generator |
US6215876B1 (en) | 1997-12-31 | 2001-04-10 | Transcrypt International, Inc. | Apparatus for and method of detecting initialization vector errors and maintaining cryptographic synchronization without substantial increase in overhead |
US6249582B1 (en) | 1997-12-31 | 2001-06-19 | Transcrypt International, Inc. | Apparatus for and method of overhead reduction in a block cipher |
US6891952B1 (en) * | 1998-12-07 | 2005-05-10 | International Business Machines Corporation | Dynamic key generation and confidential synchronization of encryption components |
US7190787B1 (en) * | 1999-11-30 | 2007-03-13 | Intel Corporation | Stream cipher having a combiner function with storage based shuffle unit |
US20050053240A1 (en) * | 2003-09-09 | 2005-03-10 | Peter Lablans | Ternary and higher multi-value digital scramblers/descramblers |
US20050084111A1 (en) * | 2003-09-09 | 2005-04-21 | Peter Lablans | Ternary and higher multi-value digital scramblers/descramblers |
US20110064214A1 (en) * | 2003-09-09 | 2011-03-17 | Ternarylogic Llc | Methods and Apparatus in Alternate Finite Field Based Coders and Decoders |
US7864079B1 (en) | 2003-09-09 | 2011-01-04 | Ternarylogic Llc | Ternary and higher multi-value digital scramblers/descramblers |
US20100322414A1 (en) * | 2003-09-09 | 2010-12-23 | Ternarylogic Llc | Ternary and higher multi-value digital scramblers/descramblers |
US7505589B2 (en) | 2003-09-09 | 2009-03-17 | Temarylogic, Llc | Ternary and higher multi-value digital scramblers/descramblers |
US7002490B2 (en) | 2003-09-09 | 2006-02-21 | Ternarylogic Llc | Ternary and higher multi-value digital scramblers/descramblers |
US20090060202A1 (en) * | 2003-09-09 | 2009-03-05 | Peter Lablans | Ternary and Higher Multi-Value Digital Scramblers/Descramblers |
US7643632B2 (en) | 2004-02-25 | 2010-01-05 | Ternarylogic Llc | Ternary and multi-value digital signal scramblers, descramblers and sequence generators |
US20110170697A1 (en) * | 2004-02-25 | 2011-07-14 | Ternarylogic Llc | Ternary and Multi-Value Digital Signal Scramblers, Decramblers and Sequence Generators |
US20070110229A1 (en) * | 2004-02-25 | 2007-05-17 | Ternarylogic, Llc | Ternary and Multi-Value Digital Signal Scramblers, Descramblers and Sequence of Generators |
US20070152710A1 (en) * | 2004-02-25 | 2007-07-05 | Peter Lablans | Single and composite binary and multi-valued logic functions from gates and inverters |
US7355444B2 (en) | 2004-02-25 | 2008-04-08 | Ternarylogic Llc | Single and composite binary and multi-valued logic functions from gates and inverters |
US8589466B2 (en) | 2004-02-25 | 2013-11-19 | Ternarylogic Llc | Ternary and multi-value digital signal scramblers, decramblers and sequence generators |
US8374289B2 (en) | 2004-02-25 | 2013-02-12 | Ternarylogic Llc | Generation and detection of non-binary digital sequences |
US20090128190A1 (en) * | 2004-02-25 | 2009-05-21 | Peter Lablans | Implementing Logic Functions with Non-Magnitude Based Physical Phenomena |
US7548092B2 (en) | 2004-02-25 | 2009-06-16 | Ternarylogic Llc | Implementing logic functions with non-magnitude based physical phenomena |
US7218144B2 (en) | 2004-02-25 | 2007-05-15 | Ternarylogic Llc | Single and composite binary and multi-valued logic functions from gates and inverters |
US7580472B2 (en) | 2004-02-25 | 2009-08-25 | Ternarylogic Llc | Generation and detection of non-binary digital sequences |
US20050184888A1 (en) * | 2004-02-25 | 2005-08-25 | Peter Lablans | Generation and detection of non-binary digital sequences |
US7696785B2 (en) | 2004-02-25 | 2010-04-13 | Ternarylogic Llc | Implementing logic functions with non-magnitude based physical phenomena |
US20050185796A1 (en) * | 2004-02-25 | 2005-08-25 | Peter Lablans | Ternary and multi-value digital signal scramblers, descramblers and sequence generators |
US20050194993A1 (en) * | 2004-02-25 | 2005-09-08 | Peter Lablans | Single and composite binary and multi-valued logic functions from gates and inverters |
US20060021003A1 (en) * | 2004-06-23 | 2006-01-26 | Janus Software, Inc | Biometric authentication system |
US7562106B2 (en) | 2004-08-07 | 2009-07-14 | Ternarylogic Llc | Multi-value digital calculating circuits, including multipliers |
US20060031278A1 (en) * | 2004-08-07 | 2006-02-09 | Peter Lablans | Multi-value digital calculating circuits, including multipliers |
US20100164548A1 (en) * | 2004-09-08 | 2010-07-01 | Ternarylogic Llc | Implementing Logic Functions With Non-Magnitude Based Physical Phenomena |
US7889864B2 (en) * | 2005-04-11 | 2011-02-15 | Panasonic Corporation | Data processing system and method |
US20060227967A1 (en) * | 2005-04-11 | 2006-10-12 | Tomoki Nishikawa | Data processing system and method |
US9009496B2 (en) | 2008-09-22 | 2015-04-14 | Envault Corporation Oy | Method and apparatus for implementing secure and selectively deniable file storage |
WO2011001030A1 (en) * | 2009-06-29 | 2011-01-06 | Envault Corporation Oy | Method and arrangement for protecting file-based information |
US8577026B2 (en) | 2010-12-29 | 2013-11-05 | Ternarylogic Llc | Methods and apparatus in alternate finite field based coders and decoders |
US8861725B2 (en) | 2012-07-10 | 2014-10-14 | Infineon Technologies Ag | Random bit stream generator with enhanced backward secrecy |
US8879733B2 (en) | 2012-07-10 | 2014-11-04 | Infineon Technologies Ag | Random bit stream generator with guaranteed minimum period |
US10263968B1 (en) * | 2015-07-24 | 2019-04-16 | Hologic Inc. | Security measure for exchanging keys over networks |
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